Modified magnetic coil structure

Abstract

Disclosed is a modified magnetic coil structure. A substrate, at least one circuit pattern layer and a permeability enforced ring are included. The substrate is formed of an electrical insulation material, and has a through hole. The circuit pattern layer is formed of an electrically conductive material and configured in the substrate to surround but not contact the through hole. The permeability enforced ring is formed of a high permeability material and provided in the through hole so as to fully cover a sidewall of the through hole. The permeability enforced ring and the substrate form two co-planes in an upper horizontal plane and a lower horizontal plane of the modified magnetic coil structure, respectively. Therefore, the present invention employs the permeability enforced ring to greatly increase magnetic flux density to form a high permeability device, thereby improving the electromagnetic effect and properties of the magnetic coil.

What is claimed is: 
     
         1 . A modified magnetic coil structure, comprising:
 a substrate formed of an electrical insulation material, having a thickness in a vertical direction, and comprising a through hole penetrating the thickness in the vertical direction and having a closed shape in a horizontal sectional area;   a circuit pattern layer formed of an electrically conductive material and configured in the substrate to surround the through hole, wherein the circuit pattern layer does not contact the through hole; and   a permeability enforced ring formed of a high permeability material, provided in the through hole, and fully covering a sidewall of the through hole.   
     
     
         2 . The modified magnetic coil structure as claimed in  claim 1 , wherein the closed shape comprises a circle, an ellipse, a square or a rectangle. 
     
     
         3 . The modified magnetic coil structure as claimed in  claim 1 , wherein the electrically conductive material comprises a copper foil, and the high permeability material comprises zinc electroplated steel, medium carbon steel, permalloy, nickel iron alloy or nickel steel sheets. 
     
     
         4 . The modified magnetic coil structure as claimed in  claim 1 , wherein the permeability enforced ring and the substrate form two co-planes in an upper horizontal plane and a lower horizontal plane of the modified magnetic coil structure, respectively. 
     
     
         5 . A modified magnetic coil structure, comprising:
 a substrate formed of an electrical insulation material, having a thickness in a vertical direction, and comprising a through hole penetrating the thickness in the vertical direction and having a closed shape in a horizontal sectional area, wherein the substrate has a square shape in a horizontal sectional area;   a plurality of circuit pattern layers formed of an electrically conductive material and configured in the substrate to surround the through hole, wherein the circuit pattern layers do not contact the through hole and are electrically isolated to each other; and   a permeability enforced ring formed of a high permeability material, provided in the through hole, and fully covering a sidewall of the through hole.   
     
     
         6 . The modified magnetic coil structure as claimed in  claim 5 , wherein the closed shape comprises a circle, an ellipse, a square or a rectangle. 
     
     
         7 . The modified magnetic coil structure as claimed in  claim 5 , wherein the electrically conductive material comprises a copper foil, and the high permeability material comprises zinc electroplated steel, medium carbon steel, permalloy, nickel iron alloy or nickel steel sheets. 
     
     
         8 . The modified magnetic coil structure as claimed in  claim 5 , wherein the permeability enforced ring and the substrate form two co-planes in an upper horizontal plane and a lower horizontal plane of the modified magnetic coil structure, respectively.